From an urn containing a white and b black balls, k ( th ball is drawn. Assertion …
Mathematics · JEE Advanced · NTA Exams — Statistics and Probability
From an urn containing a white and b black balls,
k (< a, b) are drawn and laid aside, their colour unnoted. Then another ball, that is, (k + 1)th ball is drawn.
Assertion : Probability that (k + 1)th ball drawn is white is \(\frac{a}{a+b}\).
Reason : Probability that (k + 1)th ball drawn is black is \(\frac{a}{a+b}\)
k (< a, b) are drawn and laid aside, their colour unnoted. Then another ball, that is, (k + 1)th ball is drawn.
Assertion : Probability that (k + 1)th ball drawn is white is \(\frac{a}{a+b}\).
Reason : Probability that (k + 1)th ball drawn is black is \(\frac{a}{a+b}\)
- If both assertion and reason are correct and reason is the correct explanation of assertion.
- If both assertion and reason are true but reason is not the correct explanation of assertion.
- If assertion is true but reason is false.
- If assertion is false but reason is true.
Answer
(C) If assertion is true but reason is false.
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